Keep in mind bruising on the legs is a very common occurrence and can happen quite easily. By itself, it’s usually not a sign of an underlying health condition. You’d most likely have bruising on other areas of your body that are accompanied by other symptoms, such as easy or excessive bleeding.

vasculitis, an inflammation of the blood vessels that happens when your immune system attacks them by mistake

sepsis, an extreme and life-threatening reaction by your body to an infection

heavy alcohol use

It’s also important to note another possible cause of unexplained leg bruising in a child, loved one, or friend is abuse. This can include things like domestic abuse, child abuse, and elder abuse. Contact your local authorities or an abuse hotline if you suspect someone is being abused.

Many things can cause you or your child to have unexplained bruises on your legs. You most likely just bruise more easily than others, and therefore don’t remember the injury or bump that caused the bruise.

In other cases, bruising can result from a medication, supplement, or underlying health condition. If you find that you or your child’s bruises occur frequently, are large, and don’t improve after a week or two, see your doctor.